Novel composite crossarm for utility pole

ABSTRACT

A novel composite crossarm for utility poles comprising a honeycomb structure filler inside the novel composite crossarm to increase bending resistance strength of the composite crossarm and improve crush resistance performance to prevent the composite crossarm from deforming when an insulator bolt is excessively screwed. Filling the composite crossarm with the honeycomb structure filler can also improve twisting resistance performance of the composite crossarm.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of Chinese utility mode application number 2018210375233, filed Jul. 3, 2018, entitled “NOVEL COMPOSITE CROSSARM FOR UTILITY POLE”, the entire content of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION Field of the Art

The present invention relates to the technical field of electric power equipment, and specifically, to an improved composite crossarm for utility pole.

Discussion of the State of the Art

A composite crossarm for utility pole has advantages such as good insulation property and long service life. However, bending resistance strength and twisting resistance strength are relatively low. An existing solution is to fill a composite tube with polyurethane rigid foams or pouring polyurethane rigid foams into a composite tube, the polyurethane rigid foams only provide an effect of preventing rainwater from entering the crossarm in rainy days but cannot increase bending resistance strength and twisting resistance strength of the composite crossarm.

SUMMARY OF THE INVENTION

A technical problem to be resolved by the present invention is to provide a novel composite crossarm for utility pole.

To resolve the foregoing technical problem, the present invention is implemented by using a novel composite crossarm is provided, and a filler inside the crossarm is a honeycomb structure filler.

In some embodiments, the honeycomb structure filler may be placed in a transverse direction inside the composite crossarm.

In some embodiments, the honeycomb structure filler may be placed in a longitudinal direction inside the composite crossarm.

In some embodiments, the honeycomb structure filler may be adhered and fixed inside of the crossarm.

In some embodiments, the polyurethane rigid foam may be injected into the honeycomb cells of the honeycomb structure filler.

In some embodiments, the honeycomb cell of the honeycomb structure filler may be a regular hexagonal cell.

In some embodiments, the honeycomb cell of the honeycomb structure filler may be a circular cell.

The present invention has the following beneficial effects: filling the composite crossarm with the honeycomb structure filler can increase bending resistance strength of the composite crossarm and improve crush resistance performance to prevent the composite crossarm from deforming when an insulator bolt is excessively screwed. Filling the composite crossarm with the honeycomb structure filler can also improve twisting resistance performance of the composite crossarm.

BRIEF DESCRIPTION OF THE DRAWING FIGURES

The accompanying drawings illustrate several embodiments of the invention and, together with the description, serve to explain the principles of the invention according to the embodiments. It will be appreciated by one skilled in the art that the particular embodiments illustrated in the drawings are merely exemplary and are not to be considered as limiting of the scope of the invention or the claims herein in any way.

FIGS. 1A and 1B is a schematic transverse cross-sectional view according to a first embodiment of the invention; and

FIG. 2 is a schematic longitudinal cross-sectional view according to a second embodiment of the invention.

The drawings use the following reference numerals:

-   -   1. Crossarm     -   2. Honeycomb structure filler     -   3. Adhesive     -   4. Polyurethane rigid foam.

DETAILED DESCRIPTION

One or more different inventions may be described in the present application. Further, for one or more of the inventions described herein, numerous alternative embodiments may be described; it should be appreciated that these are presented for illustrative purposes only and are not limiting of the inventions contained herein or the claims presented herein in any way. One or more of the inventions may be widely applicable to numerous embodiments, as may be readily apparent from the disclosure. In general, embodiments are described in sufficient detail to enable those skilled in the art to practice one or more of the inventions, and it should be appreciated that other embodiments may be utilized and that structural, logical, software, electrical and other changes may be made without departing from the scope of the particular inventions. Accordingly, one skilled in the art will recognize that one or more of the inventions may be practiced with various modifications and alterations. Particular features of one or more of the inventions described herein may be described with reference to one or more particular embodiments or figures that form a part of the present disclosure, and in which are shown, by way of illustration, specific embodiments of one or more of the inventions. It should be appreciated, however, that such features are not limited to usage in the one or more particular embodiments or figures with reference to which they are described. The present disclosure is neither a literal description of all embodiments of one or more of the inventions nor a listing of features of one or more of the inventions that must be present in all embodiments.

Headings of sections provided in this patent application and the title of this patent application are for convenience only, and are not to be taken as limiting the disclosure in any way.

The following describes the present invention in detail with reference to the accompanying drawings and specific implementations.

FIGS. 1A and 1B is a transverse cross-sectional schematic view according to a first embodiment of the invention. A crossarm 1 is a hollow structure made of composite material, the crossarm 1 may be filled with a honeycomb structure hexagonal filler 2A. In some embodiments, the honeycomb structure filler 2 may be placed in a transverse direction inside the crossarm 1 (referring to FIG. 2). In some embodiments, the honeycomb cell of the honeycomb structure filler 2B may be in a circular shape. In some embodiments, the honeycomb structure filler 2 may be adhered and fixed to the crossarm 1 by using an adhesive 3.

FIG. 2 is a longitudinal cross-sectional schematic view according to a second embodiment of the invention. According to the embodiment, a honeycomb structure filler 2 may be placed in a longitudinal direction inside the crossarm 1, the honeycomb cell of the honeycomb structure filler 2 may be a hexagonal shape. In some embodiments, polyurethane rigid foam 4 may be injected into the honeycomb cells of the honeycomb structure filler 2.

It should be emphasized that the foregoing descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any simple alteration, equivalent change or modification made to the foregoing embodiments according to the technical essence of the present invention shall fall within the scope of the technical solutions of the present invention.

The skilled person will be aware of a range of possible modifications of the various embodiments described above. Accordingly, the present invention is defined by the claims and their equivalents. 

What is claimed is:
 1. A novel composite crossarm for utility poles, comprising a filler inside the crossarm, the filler is a honeycomb structure filler.
 2. The novel composite crossarm according to claim 1, wherein the honeycomb structure filler is placed in a transverse direction inside the crossarm.
 3. The novel composite crossarm according to claim 1, wherein the honeycomb structure filler is placed in a longitudinal direction inside the crossarm.
 4. The novel composite crossarm according to claim 1, wherein the honeycomb structure filler is adhered and fixed inside the crossarm.
 5. The novel composite crossarm according to claim 1, wherein the polyurethane rigid foam is injected into the honeycomb cells of the honeycomb structure filler.
 6. The novel composite crossarm according to claim 1, wherein the honeycomb cell of the honeycomb structure filler is a regular hexagonal cell.
 7. The novel composite crossarm according to claim 1, wherein the honeycomb cell of the honeycomb structure filler is a circular cell. 